/ Thesaurus / R Synonyms of ranitidine Find synonyms for: Noun1. ranitidine, Zantac, histamine blocker, antacid, gastric antacid, alkalizer, alkaliser, antiacidusage: a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal refluxWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language